Disassemble a failed drive or tape player CDs. All extracted parts use discretion, except for a commutator motor of movement of the read node or rewind of the tape. This engine has another valuable quality in comparison with similar products from toys: his bearing, located on the back side - not polystyrene, and steel. Because of this, he breaks down in the Annex to the shaft for both radial and axial efforts.
Slip into the shaft of the motor small-sized collet. Hold it worn dental Bur, more unusable for its intended purpose. This tool will give you in any dental clinic.
Assemble a series circuit of a DC voltage, which is slightly below par for the engine (the source should be rated at about 500 mA), pedal switch non-latching engine. The polarity is desirable to observe specified on the motor. Parallel to the engine include paper or ceramic capacitor of any capacity. Insulate all connections to points off not to get a nasty shock voltage of self-induction, accidentally touching live parts.
Place the pedal on the floor. A serious drawback of this type of engine is overheating during long hours of work even at idle. So turn it off the pedal even for short interruptions (a few seconds).
The style of work develop gradually, experimentally picking up the pressing force of the shaft with the engraving of different metals so that its rotation is not introduced distortions in the line shapes. Remember, the softer the metal, the less the wear of boron. When he finally wear out, replace it. When training strive to learn how to apply labels to metal's M. O., what do you usually write with pen on paper. Conduct training on metal objects of no value.
At the end of work, disconnect the power supply from the network.